Supplemental ChapterAs mentioned earlier, this is the first of several supplemental chapters about how Elasticsearch operates in a distributed environment. In this chapter, we explain commonly used terminology like cluster, node, and shard, the mechanics of how Elasticsearch scales out, and how it deals with hardware failure.앞에서 언급했듯이, 이 장은 분산 환경에서 Elasticsearch가 어떻게 동작하는지에 대한 여러 추가 장들 중의 첫 번째이다..